<template>
  <el-container class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img src="../../assets/images/logo.png" alt="" />
      <!-- 右侧的菜单 -->
      <div class='userInfo'>
        <img :src="userinfo.user_pic" alt="" class="avatar" v-if="userinfo.user_pic"/>
        <img src="../../assets/logo.png" alt="" class="avatar" v-else />
        <span>{{userinfo.nickname || userinfo.username}}</span>
        <span @click="logout">退出</span>
      </div>
    </el-header>

    <el-container>
      <!-- 侧边栏区域 -->
      <el-aside width="200px">
          <!-- 用户信息 -->
        <div class="user-box">
          <img :src="userinfo.user_pic" alt="" v-if="userinfo.user_pic"/>
          <img src="../../assets/logo.png" alt="" v-else/>
          <span>欢迎{{userinfo.nickname || userinfo.username}}</span>
        </div>

        <el-menu
            :default-active="$route.path"
            class="el-menu-vertical-demo"
            background-color="#23262E"
            text-color="#fff"
            active-text-color="#409EFF"
            unique-opened
            router
            >
            <template v-for="item in menus">
                 <!-- 不包含子菜单的“一级菜单” -->
            <el-menu-item :index="item.indexPath" :key="item.indexPath" v-if="!item.children">
                <i :class="item.icon"></i>
                <span>{{item.title}}</span>
                </el-menu-item>
            <!-- 包含子菜单的“一级菜单” -->
            <el-submenu :index="item.indexPath" :key="item.indexPath" v-else>

                <template slot="title">
                <i :class="item.icon"></i>
                <span>{{item.title}}</span>
                </template>

               <el-menu-item :index="subItem.indexPath" v-for="subItem in item.children" :key="subItem.indexPath">
                  <i :class="subItem.icon"></i>
                  <span>{{ subItem.title }}</span>
                </el-menu-item>
            </el-submenu>
            </template>

        </el-menu>
  </el-aside>

      <el-container>
        <!-- 页面主体区域 -->
        <el-main>
          <!-- 设置二级路由 -->
          <router-view></router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>© www.itheima.com - 黑马程序员</el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
import { mapState } from 'vuex'
export default {
  name: 'MainIndex',
  data () {
    return {
      menus: []
    }
  },
  methods: {
    async logout () {
      const res = await this.$confirm('此操作将退出登录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 1. 点击确认:confirm
      // 2. 点击取消:不做任何操作 报错catch可以捕获这个错误信息
      if (res !== 'confirm') return false

      // 退出业务逻辑
      //   1.清除token
      this.$store.commit('updateToken', '')
      //   2.跳转到登录页
      this.$router.push('/login')
    },
    // 获取菜单栏数据
    async initMenus () {
      const { data: res } = await this.$http.get('/my/menus')
      //   console.log(res)
      if (res.code === 0) {
        this.menus = res.data
      }
    }
  },
  created () {
    if (this.token) {
      // 进入页面获取用户信息
      this.$store.dispatch('initUserInfo')
      // 进入页面获取菜单信息
      this.initMenus()
    } else {
      this.$router.push('/login')
    }
  },
  computed: {
    ...mapState(['userinfo', 'token'])
  }
}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;
  .el-header,
  .el-aside {
    background-color: #23262e;
  }
  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
    .userInfo {
      display: flex;
      align-items: center;
      span {
        margin:0 5px;
        color:white;
        font-size: 16px;
      }
    }
  }
  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #F2F2F2;
  }
  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}
// 左侧边栏用户信息区域
.user-box {
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid #000;
  border-bottom: 1px solid #000;
  user-select: none;
  img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: #fff;
    margin-right: 15px;
    object-fit: cover;
  }
  span {
    color: white;
    font-size: 12px;
  }
}
// 侧边栏菜单的样式
.el-aside {
  .el-submenu,
  .el-menu-item {
    width: 200px;
    user-select: none;
  }
}
</style>
